Aerospace: Easy as RBC

Cramer is bullish on aerospace stocks because when airlines go bankrupt, people "throw money at them," said Cramer. Airlines then buy planes with that money, which means you can do well buying the stocks of Boeing ( BA), Honeywell International ( HON), BE Aerospace ( BEAV), United Technologies ( UTX) or Precision Castparts ( PCP), said Cramer.

But, an under-the-radar play Cramer likes is RBC Bearings ( ROLL). RBC makes ball bearings for use in the aerospace and defense industries (among others), two industries that are in bull market mode, said Cramer. The stock came public in August and is just up modestly since then, he said, but reported 17% revenue growth in its last-reported quarter, much of that growth from aerospace and defense, said Cramer.

In response to a question about a play on avionics systems upgrades, Cramer said he liked Aviall ( AVL) but cautioned the stock is very near its 52-week high. He would let it come down a little before buying.

Commenting on Timken ( TKR), Cramer said Timken was the "king of ball bearings" and is a great company. However, Timken is very well known, said Cramer, which is why he likes RBC Bearings better at this time.

Stocks Best Lost in Translation

Cramer often cautions about investing in stocks of Chinese companies and offered two more reasons to be cautious Friday. Cramer highlighted Tiens Biotech Group ( TBV) and New Dragon Asia ( NWD).

Tiens Biotech may sound like an exciting Chinese biotech company, said Cramer, but in actuality, it isn't a biotech company at all. Instead Tiens makes vitamin and nutritional supplements. But, the "misleading name isn't even the worst part," said Cramer. According to the company's most recent 10-Q, all of the company's sales are made to entities controlled by Tiens' CEO and his family, thus making it impossible to tell if the sales are for real, said Cramer.

New Dragon Asia may sound exciting, too, but it is actually a Chinese noodle company with just 5% growth last quarter, said Cramer. What's worse, insiders recently sold all their stock taking advantage of the stock's significant rise in recent weeks, he said.

The lesson, said Cramer, is at the very least, if you are going to buy Chinese stocks, it's imperative to do your homework. Better yet, if you want to invest in biotech stocks, stick with American biotech stalwarts such as Amgen ( AMGN) and Genentech ( DNA), he said. For food stocks, own General Mills ( GIS).

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